Do you have a front locker?
It takes a lot of stress off the steering box and frame, so I'd say not overkill especially if you have a front locker.
Yes, it will help. You are probably getting as much stress on steering parts from the rear Spartan as you are with the front ARB.
Honestly I miss my old set up of a locked front and the stock limited in the rear. I didn't have nearly as much issues steering but of course I couldn't leave well enough alone. I'm not even sure exactly how the hydro assist works. It doesn't replace the steering box does it? I'd rather not since it's pretty new
You can google around and find some good how to info.
My father in law has a tj on 33's with ARB's front and rear, For him I would think there are better things to spend the money on, he is pretty easy on the jeep. I would also look into the longevity of d30 knuckles with a ram, I worry about my d60 knuckles with the ram.
It is a great upgrade.
My experience, which is a d60 with 37's, was great, the only down side is that steering is not as quick, if I had to steer quickly to the right then back to the left I don't think the tires would do it, but I also think the jeep would be on its roof if I steered that quickly. Even with a re-enforced uni-body it is a good piece of mind for me to have the ram doing most of the work.
Building your own setup is one of those things that seems really hard, but if you do the research and build it up it ends up being easier than you thought.
Nathan
Those are exactly what I was thinking. I'd never have a rig that would come close to needing it but found a lot of examples when searching hydro assist set ups.
Looks like this also gets rid of the steering stabilizer. I haven't seen an example using the stock configuration though. Is there a reason for it? I figured maybe because most do a high steer set up.